Malicious PDF — malware analysis report

Static analysis result for SHA-256 16657b0c0e6ebf36…

MALICIOUS

PDF

44.4 KB Created: 2020-08-02 11:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57f8905786208e9a3f5f33781bf3a90e SHA-1: 94f73288f2712d84327d0e9deb5a76040e68e728 SHA-256: 16657b0c0e6ebf36f12314208288015f0b211c5b606727526cddf5d4702d1e7e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to installing chromedriver and includes the malicious URL, suggesting a phishing or malware distribution lure. The presence of many external PDF links further indicates a link farm or SEO poisoning tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=install+chromedriver+ubuntu In PDF document text
    • http://files.karmaindiatravel.com/uploads/1/3/1/4/131483097/6050598.pdfIn PDF document text
    • http://files.tctcrafts.com/uploads/1/3/2/6/132695372/4fd465.pdfIn PDF document text
    • http://files.innovaxin.com/uploads/1/3/1/4/131453247/velibawuximeruga.pdfIn PDF document text
    • http://files.losalamitosunit716.org/uploads/1/3/0/8/130814127/xebura-vefasu-tonilekurokom-wegusodejabe.pdfIn PDF document text
    • http://files.ruthmillerembroidery.com/uploads/1/3/1/3/131379689/lijeganeroreraxemu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/begudanelugotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/59556414984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/kupowelizoliboxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/fefogiboruwen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/zinetesowasiwurukevopat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/82208713628.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/konirizutir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1139/1135/files/mobokikoxiwepuwuvilab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5542/3396/files/tiditugojasofedikole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/bakakuwafafobiwolodoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4772/1892/files/96997651436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/sodiwakiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/39429043174.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF5 5316 bytes
SHA-256: d88f7567bc28a605b53d4bf263681af3463c5993aaec75856574e904a7cb85d9
font_01_sfnt_off000081da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DA 10248 bytes
SHA-256: ea7a890426ed18701083ae7b0949407ecdd4e45125e62be718f89b79358fb2a5

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